Change8

Tokenizers

AI & LLMs

💥 Fast State-of-the-Art Tokenizers optimized for Research and Production

Latest: v0.23.215 releases6 breaking changesView on GitHub

Release History

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v0.23.25 fixes2 features
Sep 3, 2026

This release includes the implementation of Parity-aware BPE and various CI/CD improvements. It also marks the final v0 release before the transition to v1.

v0.23.1Breaking3 fixes5 features
Apr 27, 2026

Version 0.23.1 is the first stable release in the 0.23 line, featuring massive performance gains in vocabulary loading, full Python type hints, and stable multi-platform Node.js bindings. Python 3.9 support has been dropped.

v0.23.1rc01 fix
Apr 27, 2026

Ensures that necessary npm directories are created before artifacts are written, resolving a publish failure for the `darwin-universal` target. This change makes the artifact creation process more robust by handling missing directories automatically.

v0.23.0rc0Breaking
Apr 24, 2026

The `@napi-rs/cli` has removed the `--name` flag from the `napi universal` command, now inferring the name from `package.json`. This change requires users to adjust their build commands.

v0.22.23 fixes2 features
Dec 2, 2025

This release focuses on performance improvements, achieving 4x to 8x faster vocab loading with many added tokens due to GIL-free operations, alongside general typing and bug fixes.

v0.22.2rc0
Dec 2, 2025
v0.22.1
Sep 19, 2025

Release v0.22.1 primarily involves bumping the upper version constraint for huggingface_hub and includes several documentation updates and trainer signature improvements.

v0.22.1rc0
Sep 19, 2025
v0.22.03 fixes3 features
Aug 29, 2025

This release introduces native async bindings and adds `from_bytes`/`read_bytes` methods to WordPiece Tokenizer for WebAssembly compatibility. It also includes several bug fixes and dependency updates.

v0.22.0rc0
Aug 29, 2025
v0.21.4
Jul 28, 2025

This release (v0.21.4) is a re-release of v0.21.3 because the initial v0.21.3 release failed.

v0.21.3Breaking1 fix
Jul 4, 2025

This patch release addresses Clippy fixes and resolves an introduced backward breaking change in the Rust APIs.

v0.21.2Breaking7 fixes3 features
Jun 24, 2025

This release focuses on performance optimizations, enabling broader Python no GIL support, and fixing several issues related to onig compilation and training logic.

v0.21.1Breaking4 fixes2 features
Mar 13, 2025

This release upgrades the underlying Rust bindings to PyO3 0.23, drops support for older Python versions (3.7/3.8), and includes several bug fixes related to streaming and string normalization.

v0.21.1rc0Breaking5 fixes2 features
Mar 12, 2025

This release upgrades the underlying Rust bindings to PyO3 0.23 and drops support for older Python versions (3.7, 3.8). It also introduces feature updates like support for updating template processors and several bug fixes.

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